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3 years ago

Y = -2x + 5 and 2x + y = -1 Solutions

Mathematics

1 answer:

Naily [24]3 years ago

7 0

Answer:

no solution

Step-by-step explanation:

hello

we replace y = -2x + 5 in the second expression and it comes

2x + -2x + 5 = -1

<=> 5 = -1

this is always false so there is no solution

hope this helps

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3 years ago

Martine’s town is building a volleyball court based on a scale drawing that is 40cm to 80cm and uses the scale 1cm:22.5cm write

never [62]

Answer:

$y=22.5x$

Step-by-step explanation:

we have that

The scale drawing is

$\frac{1}{22.5}\frac{cm}{cm}$

we know that

Using proportion find out the actual dimensions of the volleyball court

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y ----> court lengths in cm

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For x=80 cm

$\frac{1}{22.5}\frac{cm}{cm}=\frac{80}{y}\frac{cm}{cm}\\\\y=80*22.5\\\\y=1,800\ cm$

Find the equation for the proportional relation ship between drawing court lengths x in centimeters and court lengths in y centimeters

A relationship between two variables, x, and y, represent a proportional variation if it can be expressed in the form $y/x=k$ or $y=kx$

For x=40 cm, y=900

substitute

$k=y/x$ -----> $k=900/40=22.5$

The equation is

$y=22.5x$

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3 years ago

Can someone please help me?

Nonamiya [84]

you have to read the bottom link for the answer key

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2 years ago